http://iopscience.iop.org/article/10.1088/1361-6528/aadbf7

Facile synthesis of self-assembled carbon nanotubes/dye composite films for sensitive electrochemical determination of Cd(II) ionsKaiyue Chen1, Junkai Li2, Lexin Zhang3, Ruirui Xing4, Tifeng Jiao5, Fa-ming Gao6 and Qiuming Peng7